Panzer General Allied Assault

Get any victory on any difficulty on all 12 main single player campaign maps to get this achievement.

Listing strategies for all 12 levels goes beyond the scope of this solution IMO but due to some hatemail and a negative vote I decided to include a general strategy which can be used for any and all levels.

1) A.I. unit placement at the start of a level is fixed. Use this to your advantage. Restart if your artillery is vulnerable or when you can't destroy a key target in one turn.
2) Identify all key targets. Locations with defense bonuses and other priority targets like enemy artillery.
3) Make sure you destroy an enemy unit when attacking. Otherwise you just wasted (a lot of) cards. And in some cases the attacking unit...
4) Artillery, artillery, artillery! The more the better!Don't forget to check their range before placing!
5) Infantry with auto dig-in can be used to gain additional attack bonus without leaving them vulnerable to attack.
6) Use cards that allow you to move multiple units one square or one unit two squares, to clear your own home row and push forward. Allowing you to place more artillery!

I always go for the fast victory types, securing it by occupying three tiles on the enemies home row (unless the scenario forces me otherwise). Remember that you do not need to hold them for more than one turn. Saving "move unit for free" cards can really help here.

If you need more help, or with a specific level, just let me know in the comments or send me a message.